Change Details

It seems FRR doesn't seem to set the default gateway from the DHCP lease when having custom routing tables. Steps to reproduce (can be reproduced from livecd): 1) Boot VyOS (tested on rolling 2019-02-16) 2) Set eth0 to dhcp: ``` set interfaces ethernet eth0 address dhcp commit ``` 3) Get address and if you do show ip route, you will see a default route 4) Now add a custom routing table (use another interface or a vtun): ``` set protocols static table 100 interface-route 0.0.0.0/0 next-hop-interface eth1 ``` 5) Now disconnect eth0, and reconnect so it will "renew" it's lease. 6) You will it will assign ip address but when you do: "ip route" you will see there is no default gateway. Tracked it down to the following script: /sbin/dhclient-script, in update_routers(), it will do: ``` vtysh -c "conf t" -c "ip route 0.0.0.0/0 $router $ZEBRA_ROUTE_DHCP" >/dev/null 2>&1 ``` If i execute the command manually it won't work either.. So maybe an issue in FRR? If i modify update_routers() to add the "ip -4 route add ..." version to it, it will work but ofcourse this bypasses FRR.

It seems FRR doesn't seem to set the default gateway from the DHCP lease when having custom routing tables. Steps to reproduce (can be reproduced from livecd): 1) Boot VyOS (tested on rolling 2019-02-16) 2) Set eth0 to dhcp: ``` set interfaces ethernet eth0 address dhcp commit ``` 3) Get address and if you do show ip route, you will see a default route 4) Now add a custom routing table (use another interface or a vtun): ``` set protocols static table 100 interface-route 0.0.0.0/0 next-hop-interface eth1 ``` 5) Now disconnect eth0, and reconnect so it will "renew" it's lease. 6) You will see it will assign ip address but when you do: "ip route" you will see there is no default gateway. Tracked it down to the following script: /sbin/dhclient-script, in update_routers(), it will do: ``` vtysh -c "conf t" -c "ip route 0.0.0.0/0 $router $ZEBRA_ROUTE_DHCP" >/dev/null 2>&1 ``` If i execute the command manually it won't work either.. So maybe an issue in FRR? If i modify update_routers() to add the "ip -4 route add ..." version to it, it will work but ofcourse this bypasses FRR.

It seems FRR doesn't seem to set the default gateway from the DHCP lease when having custom routing tables. Steps to reproduce (can be reproduced from livecd): 1) Boot VyOS (tested on rolling 2019-02-16) 2) Set eth0 to dhcp: ``` set interfaces ethernet eth0 address dhcp commit ``` 3) Get address and if you do show ip route, you will see a default route 4) Now add a custom routing table (use another interface or a vtun): ``` set protocols static table 100 interface-route 0.0.0.0/0 next-hop-interface eth1 ``` 5) Now disconnect eth0, and reconnect so it will "renew" it's lease. 6) You will see it will assign ip address but when you do: "ip route" you will see there is no default gateway. Tracked it down to the following script: /sbin/dhclient-script, in update_routers(), it will do: ``` vtysh -c "conf t" -c "ip route 0.0.0.0/0 $router $ZEBRA_ROUTE_DHCP" >/dev/null 2>&1 ``` If i execute the command manually it won't work either.. So maybe an issue in FRR? If i modify update_routers() to add the "ip -4 route add ..." version to it, it will work but ofcourse this bypasses FRR.